introduction: one of the serious problems in the further development of maize cultivation is increasing irrigation efficiency. using conventional irrigation causes a shortage of water resources to increase the acreage of the crop. with regard to the development of maize cultivation, agronomic and executable methods must be studied to reduce water consumption. using drip irrigation system is mos...

a field study was carried out at the islamic azad university of arak in 2010 to find out the effects of salicylic acid and water deficit stress on oil yield and some physiological characteristics of different varieties of sunflower. the experiment was laid out in a factorial split plot based on a randomized complete block design with four replications. treatments consisted of water stress in th...

Currently a large scale infrastructural mall development of 48000 m is being constructed adjacent to the Mooi River in the central business district of the city of Potchefstroom. This development is facing significant environmental and social challenges due to the highly sensitive environment in which the development is being constructed. In projects like the Mooirivier Mall Development the act...

Harmonization of the instruments used in environmental policy has been considered necessary to guarantee fair competition in international markets. We investigate alternative policy measures for promoting paper recycling in seven European countries and present a theoretical framework for analyzing policy requirements for the minimum amount of recycled material to be used in production. We estim...